Agricultural implement.



J. B. BARTHOLOMEW.

AGRICULTURAL IMPLEMBNT.

APPLICATION FILED MAR..1sos.

6 SHEETS-SHEET l.

Patented Mar. 16, 1915.

J. B. BARTHOLOMEW.

AGRICULTURAL IMPLEMENT.

APPLICATION FILED MAR.G,190B'. l 1,131,897, Patented Mar.16,1915.

6 SHEETSASHEET 24 ffii/6225014 @www Ks N

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6 SHEETS-SHEET 3.

Patented Mall, 1915.

J. B. BARTHOLOMBW.

AGRICULTURAL IMPLEMENT.

APPLICATION FILED MAR. G. 190s,

J. B. BARTHOLOMEW.

AGRICULTURAL IMPLEMENT.

APPLICATION FILED MAR. 190B.

Patented Mar. 16, 1915.

e SHBETs-SHEET 4.

ffza/a//for QM K5. Hmmm {MA/.w @y y A N J. B. BARTHOLOMEW. AGMCULTUMAL IMPLBMENT.

MP'LIC'ON FILE!! Sii-JL 1902 1,131,897, Patented Mar. 1G. 1915.

G SHLE'IS-SHEET 5.

J. B. BARTHOLOMEW.

AGRICULTURAL IMPLEMENT. APPLICATION FILED MARj. 1908.

1,131,897. Patented Mar.16,1915.

6 SHEETS-SHEET 6V E fz 4435 7J UNITED STATES PATENT OFFICE.

JN B. IBIABTHOLOMEW, 0F PEORIA, ILLINOIS. ASSIGNOB., BY MESNE ASSIGNMENTS, T0 AVERY COMPANY, A CGRPORATION 0F ILLINOIS.

AGRICULTURAL IMPLEMENT.

Application led March 6, 1908.

T0 all whom t may concern Be it known that I, JOHN B. BAn'rnoLo- Mew, a citizen of the United States, residing at Peoria(` in the county of Peoria and State of Illinois, have invented certain new and useful Improvements in Agricultural Implements, of which the following is a specification, reference being had therein to the accompanying drawing.

The principal object of this invention is to provide an improved 'frame construction. and improved devices for controlling the movements or the frame parts.

Further objects will be apparent from the following specification.

' My invention is especially adapted for use in connection with corn planters, and l have therefore shown a corn planter in the drawings and will hereinafter speak of the mechanism as a, planter.

Of the dra\vings,-Figure 1 is a perspective drawing of the planter, as a whole. Fig. Q is a plan view of the planter. Fig. 3 is a rear elevation. Fig. 4 is a side elevation of the planter showing it in the normal position for planting corn. Fig. 5 is another side elevation showing the runner lifted out of the ground. Fig. 6 is a vertical transverse section taken along the line (3-6 of Fig. 5. Fig. T is a vertical sectional view through the bracket sleeve for supporting the bars upon which the seat is mounted. T he section is taken along the line T- ot' Fig. 3. `Fig. 8 is a detail perspective view of the adjustable attachment connecting the supporting arms with the iront frame for the purpose of raising or lowering either end of the front frame.

The planter frame comprises the main frame l.. on which are mounted the supporting or cover wheels 3 and the liront frame 2. The cover `wheels 3, mounted upon the axle if, are provided with the usual pair of radially converging rims 'i' secured to the spokes 6 which are riveted to the arms ofthe hub 5. To cause the axle to rotate with the wheels, the collais 8 fixed in position on the axle shaft` vby set screws 10 are provided, the collars having arms 9 which project between the spokes of the wheel. The vertical and horizontal main frame bars 12 and 13 respectively are bolted to the webs 14 of the sleeves 11 which are rotatably mounted on the axle. and fixed in position longitudinally Specification of Letters Patent.

is rotatably carried.

Patented Mar. 16, 1915.

serial nu. 419,434.

of the axle by the collar vlland hub 7 9a of the sprocket wheel 79.

Mounted in the bearing brackets l5 is the rock shaft 16 which carries the scraper blades 1T for the wheel rims. The sleeve bearings of these blades are fixed on the rock shaft by set screws, and can thus be adjusted to any position along the shaft. These scraper blades are thrown into action by means of the foot lever 18, secured to the rock shaft near its center, in a position to be easily reached by the operator.

The marker mechanisms which l have illustrated are covered by Patent No. 1,092,007 for marker mechanisms for planters, dated March 31, 1914, and based on my application Serial No. (334,508, filed .lune 21, 1911, as a division of this upplication. l do not therefore herein claim the marker construction s0 far as it is capable of general use independently of the particular I'ranie construction which l have herein shown. Each of the markers comprises a shaft 21 rotatably mounted in hangers 19 and 20, whichare freely suspended at their upper ends from the shaft 16 and the axle -l respectively and secured against longitudinal displacement by yCotter pins. The rear end ot' each of these shafts 21 is bent upwardly and is telescopic-ally fitted to the tubular rod 23, which carries at its upper end the rod 22 on which the usual marker disk The brace rod 26 extending' from the forward end of the shaft '1 to the tubular rod 23 is used to strengthen the marker frame construction. Each marker is provided with a foot lever 27 for controlling it.

The front frame 2 is pivotally connected to the upper and lower supporting links or arms 35 and 32 respectively at points in approximately the same vertical plane. and the supporting,r links or arms are similarly pivotally connected to the main frame at pointsv in the same vertical plane. lt is apparent that the links and 32 serve as parallel motion links and that the front frame is capable of motion with respect to the main frame ot' such a kind that it always maintains its verticality in all its positions as it is moved upward or downward with respect to the main frame. The lower supporting links 32 are pivotally mounted on the axle. the drawing showing two sleeved castings 29, each fitted over a lateral extension of one of the sleeves 11 and secured 1n osition by the collar 30 and set screw 31. lflo a forward extending arm of each of these castings 29 the links 32 are bolted. The upper front frame supporting links are rigidly attached to the shaft 34, mounted in bearing brackets 33, 33', 33, which are bolted in place on the channel frame bar 12.

The front frame consists of the two seedtube castings 36, firmly secured together by the cross bars 37, 38 and 39. These cross bars, as shown, are provided with a series of bolt holes 36 to permit variability in the distance between the castings 36. Cross bars 37 and 38 are connected by the yokes 40, each of which has a central plate part 42, corrugated on both sides, as shown in Fig. 8. 'lhe clamping pieces 4l, pivotally secured to the forward end of the supporting links or arms 35 and corrugated on their inner faces are adjustably secured to the plates 42 by bolts passing through apertures in both clamping pieces and yoke plate. By this adjustable connection, it is possible to tilt the front frame transversely with respect to the main frame, since the supporting links or arms 35 are always parallel by reason of their rigid mounting upon the shaft 34. The lower supporting links 32 are at their forward ends pivotally connected to the brackets 32 extending rearwardly from the cross bar 39.

The seat 43 is adjustably fastened to the seat bars 44 preferably parts of a single bar of metal having a 180 bend behind the seat. These seat bars are loosely mounted on rock-shaft 34 and pivotally connected at their forward ends to the lifting links 45. rlhe bearings` by means of which the bars 44 are mounted upon the rock shaft 34 are lindicated in Figs. :2. 6 and 7 by 44a. Each 'l`he engagement of these pins withthe ends of Lherslots limits` the movement of the hars 44 vand the seat 43 relative to the rock-shaft.

,vertically with respect to the front frame by thetie rod 51, adjustably secured to the hinge bracket 52', pivoted to cross bar 38. Lateral displacement is prevented by the struts 53. ToA the rear end of the tongue is bolted the plate 54. Rota-` tably carried by the rock shaft 34 is the bell crank casting 56, one a'rm of which is con nected to the plate 54 by the lifting link or bar 55,V pivotally secured to the bell crank casting. rl`he lower end of bar 55 passes through an aperture in the plate 54 and is prevented from disengagement with the tongue plate by the split pin 6:2. The spring 60 abutting against the plate at one end and the bar shoulder 61 at the other permits vertical play of the front frame above a predetermined position of adjustment. This verticalplay allows the runners to override any obstructions in their path and always return to exactly the same depth of cut.

The toothed sector 58 preferably formedintegral with bearing bracket 33 co-acts in the usual manner with a ieldable releasable detent on lever 57 rigi ly secured to the bell crank casting to fix the front frame in any desired position of adjustment with respect to the main frame. The foot lever 59 secured to the hand lever 57 is used to assist in the operation of liftingfthe front frame. The stop 58 movable along the slot 58h in the sector 58 serves to insure the lowering of the runners to the saine depth of cut after they have been lifted out of the ground at the turns.

The foot lever 54 attached to the rear end of the late 54 is used to lower the front frame rom an elevated position'of adjustment. The position of the scat upon the seat bars and the disposition of the lifting hars 45 is such that the weight of the front frame and tongue is just counterbalanced bv the weight of the operator. By shifting the point of attachment of the lower end of the bars 45 on the bar 3:2 and the position of the seat this counterbalancing can be effected under vai-yin Y 'conditions'.

At the ends of the ars 37 and 38 of the front frame are provided check row heads 63, 63, which may be of any desired type. Preferably the check row heads are constructed so that the check row Wire 66 can be released. A cord 73 is provided for effecting the releasing of the wire. Preferably Vthis cord is connected to the hand lever 57 so that when the lever is moved to raise the runners out of the ground, the wire is simultaneously released from the head. At each end of the rock shaft 67 there is a fork 70 adapted to be engaged by a tappet on the wire 66 to actuate the shaft.

indicates the seed hoppers which aie mounted on theseed-tiibe castings 36. The mechanism for feeding the seed from these hoppers is operated by the shaft 76 mounted in suitable bearings in the front frame. rl`he sprocket wheel 77 turns loosely upon this shaft and is geared to the drive sprocket 79 fixed upon the wheel axle by means of the chain 78. To maintain the path of the chain constant in length for all positions of the front frame relative to the main frame,

meinem the chain is carried around the idler pulle s 80. These pulleys are su 'ported from the cross bar 39 by means o the brackets 8l being located approximately at the axis of the pivotal connection between Vthe front frame and the lower supporting bars 32. The additional sprocket wheels 79, 79" axe used to obtain two other ar ratios between driving and driven wbee The shaft 76 is operatively connected with the sprocket wheel 77 by means of a clutch which is indicated as a whole by 82. This clutch may be of any form suitable for the pur but I prefer to use the clutch which 1s shown and described in my conding applicationfor clutch mechanisms or planters, Serial No. 634,510, led June 21, 1911, as a division of this application. The clutch is controlled by an arm 89 on the rock shaft 67. When the shaft is moved by the engagement of a tappet with one ofthe forks 70, the arm 89 causes the engagement of the clutch and the actuation of the shaft 76 andof the seeder mehanisms. After the .seeds for one hill have been separated, the

clutch is automatically released and remains outof engagement until the arm 89 is again moved. Secured to one of the upright arts ofthe yframe element 12 is a bell crank ever 10i) which carries a pin 99 adapted to be engaged by the foot of the operator. A link 101 connects thebell crank 100 with an arm 102 rigidly secured to the rock shaft 67. The connection between the link 101 and the arm 102 is ofthe lost motion type and permits the arm to be moved without a corre spondin movement of the link being caused. It will seen that the rock shaft canbe actuated by one of the forks to control the 'clutch without moving the foot pin 99, `but that the operator can, at will, cause a movement of the rock shaft and a releasing of the clutch simply by moving the pin 99 and the parts connected with it.

The seeder shank 129 is equipped with the usual collecting valves, operated from the rock shaft 67 b means of the arm 98h1 and the link 98". he runner or furrow opener 129b may be one of any of the well known kinds. It will be observed that l have bron ht the runner close to the planter whee s, the heel 129* of the runner being behind the transverse vertical lplane passing through the forward p art of t e wheel rim.

'In this way the difliculty is met which is experienced in planting im erfectly prepared and uneven ground, a di culty arising from the fact that if the runner is some distance in advance of theV wheel the runner will be out of the round while the wheel is riding over a sine. elevation, or while the wheel is in a hollow the runner will be cutting so deeply thatthe seeds planted at such a moment are exposed to the danger of rotting before their sprouts can reach the surface.

n win be noma um uw planter abve described can be adjusted to plant rows setl apart from one another by varying distances. To SecureV this adjuetability, the castings carrying the seedtubes and runners, the covering wheels, the wheel Scrapers, the markers, and the friction drive wheels for the reel are all movabl mounted upon the frame parts 'of the mac ine.

From the foregoing description it will be -seen that I have provided an agricultural mipletn'ent comprising two frames, vone mounted to swing about the axis of two ground wheels'and the other supported by a tongue, and connecting means between the two 'frames for guiding the front or tongue connected frame for bodily movement vertically with respect to the main or wheel supported frame. And a mechanism embodying my invention is to be distinguished from those earlier structures in each of which there were wheel supported and tongue supported frames pivotally connected together, and from those other mechanisms in each of which there was a relatively fixedly mounted main frame and a supplemental frame entirely supported thereon to be bodily movable vertically without, however, having any tongue or equivalent connection.

yThe front tongue-connected frame is vertically movable bodily in parallelism relatively to the rear axle-supported frame; and after adjustment of the front iframe relatively to the rear frame the `two frames are locked together by means of the detent onV the hand lever 57 to form a practically rigid unit. The two frames, when thus held in fixedly relationship to each other, are adapted to swing about the axis of the ground wheels under the control of the forward extending tongue.

What l claim is:

1. The combination of a main frame, two transversely opposite ground' wheels about the axis of which the frame is free to swing, a front frame vertically movable with respect tothe main frame, soil engaging devices carried by the' front frame, guiding devices for holding the front frame in parallelism during vertical movement with respect to the main frame, and a forward extending tongue rigidly connected with the front frame and serving to control the swinging of the two frames about the axis of the ground wheels.

2. The combination of a main frame, two transversely opposite ground wheels about the axis of whic the frame is free to swing. a front frame vertically movable with respect to the main frame, soil engaging dcvices carried by the front frame` parallel'- motion links connecting the main frame with the front frame, andv a forward extending tongue rigidly connected with the from frame and serving to control the swinging of theN two lframes about the axis of the ground wheels.

3. The combination of amain frame, two

transversely 'opposite ground wheels aboutl the axis of which the frame canswing, a front frame vertically movable with respect to the4 main frame, soil engaging devices 'carried' by the front lfrai',ne,tw0 transversely separated sets of parallel sets of parallelmotion links connecting 'the lmain.1 frame with the front frame', means for holding one link of one setin parallelism-with the correspondnig linko the other set, whereby the front frame is looked agtinstI transverse tilting, and a forward extending tongue rigidly connectedjwith the front frame and Y y serving to control the swinging ofthe twor e frames about the axis of the lgroujmi wheels. 2o

t. The-combination of a main frame, two

transversely opposite ground wheels about ,the axis of which the frame is free to swing,

'ja -front frame vertically movable with re- V plane, i

spect to the mainframe, soil enga Evgdevices carried by lthe kfrontl fran1e parallels motion connecting the 'main frame with the front frame, the rear pivots ofy all of the linksjbeing in one transverse vvertical 'plane and the forward pivots of all of the in another transverse vertical a forward extendin tongue links being rigidly connectedwith the front rame and serving to` control the swinging of the two i 'v frames about the axis ofthe ground Wheels- AVVwith the front frame and Serving to control th' swinging of the two frames about the aX e.

'6. The combination of a main frame, two

r5 transverselyopposite ground wheels about --1 @Qthe ais of which the frame'isfree toswing, a. 2 front frame vertically :movably connected to vthe main frame, a tilting seat support on the "main 'frame movable about a fixed'pivot, a

vertically movable vdrivers seat carried by said support, linkage connecting' said tilting seat support with the front frame and operative in all positions thereof to appl the 'weight of the driver to move the front rame upward relatively to the main frame, and

. a forward extending tongue rigidly connected with the front frame and serving to `cox'itrol the swinging of the two frames about Athe axis of the ground wheels.

7. .The combination of a main frame, two

tran," 'sv' ersely Aopposite ground l heels about the axis of which thel frame i' ree to swing, a front frame movable vertically withv respect to the main frame, twosets of arallel. motion` links connecting the front rame to the main frameg'a tilting seat support movable about a fixed pivot a drivers seat carried by said support,

age connecting the linkage support with the front frame and operative in all positions .thereof to apply'the weight of the driver-to move the front frame upward relativel V to on the main frame,

-the mainframe, and a forward exten tongue rigidly connected with the front s frame and serving to control the swinging of the two. frames about the axis of the ground wheels.v` Y

8. Th'ecombination of a main/frame, two

transversely lop 'osite ,ground wheels about* the axis of whlc thefram'e'is free to swing, a front frame movable .vertically with respect to the main frame, a tilting seat supportmovable about a-xed pivot on the main frame, a vertically movable drivers seat carried by said support, linka e between the tilting vseat support and the ront frame for v transmitting the weight of the driver to lift the front framerelatlvely to the main frame, the .linka e being adjustable to var vthe ef'ective-V orce applied to the -f'ront rame, and a forward extendin tongue rigidly connecked with the front control the swinging of the two frames about the axis of the ground wheels.

9. The combination of a main frame, two

transversely op osite groundwheels about the axlsof whic the frame is free to swing a front frame vertically movably connecte to the main frame, a tilting seat Support movable about a fixed pivot on the main' frame, a .vertically movable driverls seat carried by said support and adapted to be seame andV serving .to

roo

cured thereto in any one of a plurality of longitudinally separated positions, and link;

age between said tilting seat support and the front .frameto transmit the weight of the driver to move-the front frame upward relatively to the main frame, and av orward extending tongue rigidly connected with thefront frame and serving' to control the swinging of the two frames about the axis of the round wheels.

10. `he combination of a main frame, two

transversely opposite ground wheels about the axis of wlnc the frame is to swing a front frame vertically movably connecl to the main frame, a tilting seatsupport movable about a fixed axis on the main frame, a vertically movable drivers seat carried by the said support adapted to be se- 'cured thereto in any one of a pluralit, of longitudinally separated positions, lli' ev between the saldtxlting seat support and tlgae front frame to transmit the wei' ht of the driver to lift the front frame tively to the main frame, the said linkage being adjustable to vary the amount of force ltransmitted thereby, and a forward extending 'tongue rigidly connected with the front frame and serving to control the swinging of the two frames aboutthe axis of the ground wheels.

11. The combination of a main wheeled frame, a relatively vertically movable front frame, su port' links carr ing` the front frame an pivzlly mounte on the main frame, a tilting seat support pivotally mounted on the main frame, a drivers seat carried by said support, and linkage con-i nected at one end to the Yseat support and at the other to the said supporting links to transmit the weight of the driver to lift the front frame relatively to the mainframe.

12. The combination of ga main wheeled frame, a relatively vertically movable front frame, su orting links carrying 'theV `front frame an pivotally mounted on the main frame, a tilting seat support pivotallymounted on the main frame, a seat vcarried byfsaid support, and linkage pivotally connected at one end tothe' Aseat support and adjustabl'y connected to a thesupporting links, the linkage servin 'to transmit. the weight of the driver to liv the front frame relatively to the main frame. l

1 3. The combination of a main wheeled frame, a relativel verticali movable front frame, upper and ower para el-motion links connecting the two frames, each linkend connected to the front frame bei always in the same vertical plane with [lo other link ends connected to the front frame, a tilting seat support pivotally mounted on the main frame, a seat carried by the sup-A port, and lifting linkage connected at. one end to the seat support and adjustably connected at the other end to the lower parallai-motion links.

le. The combination of a main frame, two transversely o positeground wheels about the axis of which the frame is free to swing, a front frame bodily movable vertically with respect to the main frame, connecting means between the main and front frames for holding the front frame in parallelism during vertical movement, a lifting lever pivotally mounted upon the main rame, lifting linkage connecting the lifting lever to the front frame, the said liftin lever and linkage being supplemental to t e said connecting means, and a forward extending tongue rigidly connected with the front frame and serving to control the swinging of the two frames about the axis of the ground wheels.

15. The combination of a main frame, two

transversely o posite ground wheels about the axis of which the frame is free to swin a front frame bodily movablev vertical y with respect to the main frame, connecting means between the main and front frames for holding the front frame in arallelism during 'vertical movement, a li ting lever pivotally mounted u on the main frame and con'nected with the controllable lock forholding the lever in any of several positions, and a forward extending tongue rigidly connected with the front frame and serving to control the swinging of the two frames'about the axis of the round wheels.

16. e combination of a main wheeled frame, two transversely o posite ground wheelsabout the axis of winch the frame is ont frame, a manually free to swing, a front frame bodily movable.,

vertically with respect to the main frame, guiding-devices for holding the front frame 1n lparallelism during vertical movement wit respect to the main frame, manually operated lifting mechanism carried by the main frame and connected to the front frame, a spring carried by the lifting mechanism and adapted to yeldably hold the front frameto a predetermined lowermost position with respect to the lifting mecha` nlsm, and a longitudinal tongue rigidly connected with the front frame and servlng to control the swinging of the two frames about theaxis of the ground wheels.

17., combination of a main frame, two

transversely opplosite ground wheels about the axis o whlc the frame is free to swing, a frontfframe bodily movable vertically with respect to the main frame, connecting means between the main and front frames for holding the front `:frame in parallelism during vertical movement, aliftmg lever pivotally mounted upon the main frame and connected to the frontframe, an adjustable stop for limiting the movement of the lever and thereby limiting the relative downward movement of the front frame, and a forward extending tongue rigidly connected with the front frame `and serving to control the swinging of the two frames about the axis of the ground wheels.

18. The combination of a main wheeled frame', a relatively vertically movable front frame, parallel-motion links connecting the two frames and adapted toxhqld the front framevertical in all positions oi adjust- I..

ment, lifting mechanism for the front frame mounted u on the main frame, a hand lever forsaid li iug'mechanism, means for coun terbalancing' the front frame, and a foot lever secured to the front frame for said front frame.

19. The combination of a main frame, two transversely o posite ground wheels about the, axis of wlilch the frame can swing, a front frame vertically movable with respect to the main frame and transversely angularly adjustable with respect thereto, soil engaging devices carried .by the front frame, guiding devices for holdmg the front frame in longitudinal parallelism during vertical lowering 3:"

I iiovement with respect to thiemain, ironie, means for looking the front frame in` any of several transversely angularly adjusted positions, end a lon itudiiial forward eigment of the two' frames about the aiiisof the transversely 'op'pos'ite ground wheels aboutthejaxis of which the f ranie vis free-t0 swing,

.la ront'fr'aine vertically movable with reeot to themem frame, soil engaging-deees carried bythe front frame, parallelmotion links eonnecting 'the mein frame with the -front frame, the frontfranie being transversely angularly adjustable with Srespect to the links,A means; for 'looking the front fratrie in 'any 'of several transversely Yangnlarly adjusted positions, 'and a forward extending tongue rigidly connected with the vfront frame and, serving to control the swinging ofthel two frames about the vairis of the ground wheels.

, 21. The ccinbination o f a .main wheeled frame, a front frame bodily movable vertically with ijsi'ect to the :nain frame, two sets of paralle -motion links connecting the front frame to the main traine conprising4 an upper pair. of links and a lower. pair of links; means for holding the, links of one 1 pair in fixed position relative to each other,

and means for adjusting-vertically the pivotal connection between the front iameand Onelink of the said pair of relatively fixed links;

A22. The combination of a main Wheeled haine, a front frame movably connected I'to the main frame, a tilting seat support movablel about a. fixed pivot on the main frame, ailseat carried by said support, a stop carriedby the main framefolflixnitiiig the osc illa'tion of the tilting 'seat P0115 With ref spleet to the main frame, and) linkage connecting said seat spportyith the front frame 23. The combinationoia main Wheeled i f r arne, a front frame movably connected to mene? theniiiiii frame; a tilting seat support hav- 1ng` a journal sleeve engaiig said journal vthe mein fiorire, s journal vshift carried by shaft5- seatcarried by said sil' port,` a pin fixed to the jonrnal shaft, and` inkag'e con nectin'g'-said 'seat support with the front freine, the journal sleeve having an arcuate slot adapted' to en age the said pin tolimit the oscillation of t 'e seat sp'port relatively to themain fil-aine.

24. The combination o f amain wheeled frame, a horizontal rook shaft pivotally journal-ed to themein frame, e front freine, ytyv'o sets of 'parallelmotion links connecting the mein frame to the front frame and each ooinpri'singon upper link and a lower link theip er linksbeing rigidly carried' by the rock s aft, o'. Jtilting seat Support pivotally mounted on the rock shaft; a st-op carried by the rock shaft engagingth'e Shoulders on :the said su' port to limit the motion or oscillation of t e seat support with respect to the inain frame; a seat carried bythe said support, and linkage connecting the seat support with the frontfraine.

25. The co'mbnation of a main frame, two transversely 4opposite ground wheels about the axis of which 'the frame is free to swing, 'a' front frame vertically movable with respect to the rnan frame, soil engagin devices carried b1 the front frame, guiding devices for holv ing the front frame in parallelisin duringyertical movement with spect to the main frame, a forward extending tongue normally rigidly connected with the front frame and serving to control the swinging of thetwo frames about the axis of the round Wheels, means 'emitting the vertice? ward part of the tongue with respect to the front frame, and means foi' locking the tongue in adjusted position;

In testimony whereof I ture, in presence of two witnesses.

JOHN B BARTHOLOMEW.

Witnesses:

A. L. GREGORY,

G. W.' PERRY, Jr.

swinging adjustinen of the' for` 

